Create fiat account

curl --request POST \
  --url https://api.privy.io/v1/users/{user_id}/fiat/accounts \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --header 'privy-app-id: <privy-app-id>' \
  --data '{
  "provider": "bridge-sandbox",
  "account_owner_name": "John Doe",
  "currency": "usd",
  "bank_name": "Chase",
  "account": {
    "account_number": "1234567899",
    "routing_number": "121212121",
    "checking_or_savings": "checking"
  },
  "address": {
    "street_line_1": "123 Washington St",
    "street_line_2": "Apt 2F",
    "city": "New York",
    "state": "NY",
    "postal_code": "10001",
    "country": "USA"
  },
  "first_name": "John",
  "last_name": "Doe"
}'

{
  "id": "a068d2dd-743a-4011-9b62-8ad33cc7a7be",
  "bank_name": "Chase",
  "currency": "usd",
  "account_type": "us",
  "last_4": "7899"
}